Former Mariners coach Brian DeLunas died Sunday night at age 46 after a battle with kidney disease.

DeLunas worked as the Mariners' bullpen coach and as director of pitching development and strategies from 2018-20. He also served as a special projects coordinator for the Mets in 2021.

"We are saddened to hear of the passing of former Mariners coach Brian DeLunas," the Mariners said in a statement. "We extend our condolences to Brian's wife Johannah, son Rory, stepdaughter Maren, family, friends and all those impacted around the baseball community."

DeLunas was in his second stint as pitching coach at the University of Missouri. He first coached there from 2007-09.

He also cofounded Premier Pitching Performance, a St. Louis pitcher training center that has worked with Major League and college pitchers.